Buy at http://www.shapeways.com/model/614133... Copyright (c) 2012, M. Oskar van Deventer. Bouchon Demo is a gear demonstration, demonstration the internals of the Bouchon Cube (http://www.youtube.com/watch?v=-znFjG...). The yellow gear is alternately driven by the red and the green gear. When the red or green gear does not move, it is blocked by the yellow one. Between each alternation, there is a phase where all three gears move simultaneously.

I learned from one of my fans that this type of mechanism is called Geneva Mechanism.